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Méndez García M, García de Llasera MP, Lara Ruiz ME, Sevilla Agustín CU. Benzo(b)fluoranthene and benzo(k)fluoranthene removal by microalgae in the presence of triazine herbicides: Matrix solid-phase dispersion and solid-phase extraction (MSPD/SPE) for HPLC-UV analysis of the different culture components. J Chromatogr A 2024; 1731:465194. [PMID: 39047443 DOI: 10.1016/j.chroma.2024.465194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 07/16/2024] [Accepted: 07/18/2024] [Indexed: 07/27/2024]
Abstract
Over the last decade, human activities in the industrial and agricultural sectors have significantly increased the concentration of persistent and harmful pollutants in aquatic ecosystems. The use of microorganisms is a green strategy for the bio-removal of certain contaminants. However, other pollutants in the same ecosystems can reduce their degrading activity and even affect their survival. Therefore, this study aimed to evaluate the efficiency of benzo(b)fluoranthene (BbF) and benzo(k)fluoranthene (BkF) removal by Selenastrum capricornutum in the presence of triazine herbicides, compounds mainly used in broadleaf weeds. The interest of this work focused on identifying in which of the microalgal components the degrading activity is best evidenced and affected. For this purpose, the use of solid-phase extraction (SPE) and matrix solid-phase dispersion (MSPD) extraction procedures and HPLC-UV analysis allowed the BbF and BkF trace quantification in biomass, liquid medium, and cell lysate separately from cultures exposed to these polycyclic aromatic hydrocarbons (PAHs) alone or with herbicides. The recovery percentages were between 78 and 94 %, good linearity (r2 ≈ 0.99), precision values measured as RSD < 15 %, and limits of detection (LOQs) at levels of ng mL-1 and ng mg-1 were obtained. The individual PAH amounts measured in the components of microalgae cultures show similar removal kinetics (removal percentages: 82-89 %). Likewise, the analysis demonstrated that the removal of PAHs is not affected in the presence of triazine herbicides (atrazine and cyanazine) and with similar removal percentages (79-86 %) compared to those cultures exposed to individual PAHs (74-83 %). These results support the possible real-world applications of PAH removal by extracts from S. capricornutum in aquatic environments contaminated with PAHs and near agriculture areas where triazine herbicides are used.
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Affiliation(s)
- Manuel Méndez García
- Facultad de Química, Departamento de Química Analítica, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, D.F., 04510, Mexico.
| | - Martha Patricia García de Llasera
- Facultad de Química, Departamento de Química Analítica, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, D.F., 04510, Mexico
| | - María Elena Lara Ruiz
- Facultad de Química, Departamento de Química Analítica, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, D.F., 04510, Mexico
| | - Carlos Uriel Sevilla Agustín
- Facultad de Química, Departamento de Química Analítica, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, D.F., 04510, Mexico
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Al-Swadi HA, Al-Farraj AS, Al-Wabel MI, Ahmad M, Usman ARA, Ahmad J, Mousa MA, Rafique MI. Impacts of kaolinite enrichment on biochar and hydrochar characterization, stability, toxicity, and maize germination and growth. Sci Rep 2024; 14:1259. [PMID: 38218904 PMCID: PMC10787757 DOI: 10.1038/s41598-024-51786-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 01/09/2024] [Indexed: 01/15/2024] Open
Abstract
In this study, biochar (BC) and hydrochar (HC) composites were synthesized with natural kaolinite clay and their properties, stability, carbon (C) sequestration potential, polycyclic aromatic hydrocarbons (PAHs) toxicity, and impacts on maize germination and growth were explored. Conocarpus waste was pretreated with 0%, 10%, and 20% kaolinite and pyrolyzed to produce BCs (BC, BCK10, and BCK20, respectively), while hydrothermalized to produce HCs (HC, HCK10, and HCK20, respectively). The synthesized materials were characterized using X-ray diffraction, scanning electron microscope analyses, Fourier transform infrared, thermogravimetric analysis, surface area, proximate analyses, and chemical analysis to investigate the distinction in physiochemical and structural characteristics. The BCs showed higher C contents (85.73-92.50%) as compared to HCs (58.81-61.11%). The BCs demonstrated a higher thermal stability, aromaticity, and C sequestration potential than HCs. Kaolinite enriched-BCs showed the highest cation exchange capacity than pristine BC (34.97% higher in BCK10 and 38.04% higher in BCK20 than pristine BC), while surface area was the highest in kaolinite composited HCs (202.8% higher in HCK10 and 190.2% higher in HCK20 than pristine HC). The recalcitrance index (R50) speculated a higher recalcitrance for BC, BCK10, and BCK20 (R50 > 0.7), minimal degradability for HCK10 and HCK20 (0.5 < R50 < 0.7), and higher degradability for biomass and HC (R50 < 0.5). Overall, increasing the kaolinite enrichment percentage significantly enhanced the thermal stability and C sequestration potential of charred materials, which may be attributed to changes in the structural arrangements. The ∑ total PAHs concentration in the synthesized materials were below the USEPA's suggested limits, indicating their safe use as soil amendments. Germination indices reflected positive impacts of synthesized charred materials on maize germination and growth. Therefore, we propose that kaolinite-composited BCs and HCs could be considered as efficient and cost-effective soil amendments for improving plant growth.
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Affiliation(s)
- Hamed A Al-Swadi
- Soil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, 11451, Riyadh, Kingdom of Saudi Arabia.
| | - Abdullah S Al-Farraj
- Soil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, 11451, Riyadh, Kingdom of Saudi Arabia
| | - Mohammad I Al-Wabel
- Soil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, 11451, Riyadh, Kingdom of Saudi Arabia
| | - Munir Ahmad
- Soil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, 11451, Riyadh, Kingdom of Saudi Arabia
| | - Adel R A Usman
- Soil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, 11451, Riyadh, Kingdom of Saudi Arabia
| | - Jahangir Ahmad
- Soil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, 11451, Riyadh, Kingdom of Saudi Arabia
| | - Mohammed Awad Mousa
- Soil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, 11451, Riyadh, Kingdom of Saudi Arabia
| | - Muhammad Imran Rafique
- Soil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, 11451, Riyadh, Kingdom of Saudi Arabia
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Thacharodi A, Hassan S, Singh T, Mandal R, Chinnadurai J, Khan HA, Hussain MA, Brindhadevi K, Pugazhendhi A. Bioremediation of polycyclic aromatic hydrocarbons: An updated microbiological review. CHEMOSPHERE 2023; 328:138498. [PMID: 36996919 DOI: 10.1016/j.chemosphere.2023.138498] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/08/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
A class of organic priority pollutants known as PAHs is of critical public health and environmental concern due to its carcinogenic properties as well as its genotoxic, mutagenic, and cytotoxic properties. Research to eliminate PAHs from the environment has increased significantly due to awareness about their negative effects on the environment and human health. Various environmental factors, including nutrients, microorganisms present and their abundance, and the nature and chemical properties of the PAH affect the biodegradation of PAHs. A large spectrum of bacteria, fungi, and algae have ability to degrade PAHs with the biodegradation capacity of bacteria and fungi receiving the most attention. A considerable amount of research has been conducted in the last few decades on analyzing microbial communities for their genomic organization, enzymatic and biochemical properties capable of degrading PAH. While it is true that PAH degrading microorganisms offer potential for recovering damaged ecosystems in a cost-efficient way, new advances are needed to make these microbes more robust and successful at eliminating toxic chemicals. By optimizing some factors like adsorption, bioavailability and mass transfer of PAHs, microorganisms in their natural habitat could be greatly improved to biodegrade PAHs. This review aims to comprehensively discuss the latest findings and address the current wealth of knowledge in the microbial bioremediation of PAHs. Additionally, recent breakthroughs in PAH degradation are discussed in order to facilitate a broader understanding of the bioremediation of PAHs in the environment.
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Affiliation(s)
- Aswin Thacharodi
- Department of Biochemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Saqib Hassan
- Division of Non-Communicable Diseases, Indian Council of Medical Research (ICMR), New Delhi, 110029, India; Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, 605014, India
| | - Tripti Singh
- Department of Biotechnology, Jaypee Institute of Information Technology, Noida, Uttar Pradesh, 201309, India
| | - Ramkrishna Mandal
- Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand
| | - Jeganathan Chinnadurai
- Department of Research and Development, Dr. Thacharodi's Laboratories, No. 24, 5th Cross, Thanthaiperiyar Nagar, Ellapillaichavadi, Puducherry, 605005, India
| | - Hilal Ahmad Khan
- Department of Chemistry, Pondicherry University, Puducherry, 605014, India
| | - Mir Ashiq Hussain
- Department of Chemistry, Pondicherry University, Puducherry, 605014, India
| | - Kathirvel Brindhadevi
- Center for Transdisciplinary Research (CFTR), Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
| | - Arivalagan Pugazhendhi
- School of Engineering, Lebanese American University, Byblos, Lebanon; University Centre for Research & Development, Department of Civil Engineering, Chandigarh University, Mohali,140103, India.
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